diff --git a/README.md b/README.md
index 2a1b14e..4abfa12 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,10 @@ that Nginx performs better than Caddy in handling requests. In addition to this,
 Nginx, while having a more complicated configuration file, doesn't enforce HTTPS,
 a feature of Caddy which only complicates the setup of the HTTP Docker container.
 
+Also if the nginx receives a request from a reverse proxy, it will set the HSTS header
+and redirect to HTTPS automatically. If you do not want this behaviour, adjust the `nginx.conf`
+as you like.
+
 ## Usage
 The instructions are fairly self explanatory: clone the repository and launch the
 project. Instructions on how to launch the project are listed below. All commands
diff --git a/services/http/nginx.conf b/services/http/nginx.conf
index d73bc1b..eb52bda 100644
--- a/services/http/nginx.conf
+++ b/services/http/nginx.conf
@@ -60,7 +60,7 @@ http {
 
         sendfile off;
         
-        if ($http_x_forwarded_proto == "https") {
+        if ($http_x_forwarded_proto = "https") {
             add_header Strict-Transport-Security "max-age=31536000; includeSubDomains;";
         }
         add_header X-Content-Type-Options nosniff;